Core-making machine.



PATENTED AUG. 8, 1905.

0.1).SOHROEDER. 00m: MAKING MACHINE.

APPLIGA'IION FILED DEG. 20, 1904 w W d n 6 E 0 v r mm D S k r m C \m NM fififxxvf o QM mm MB a NN w m w QR r m CHARLES D. SCHROEDER, OF KANSAS CITY, KANSAS.

CORE-MAKING MACHINE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed December 20, 1904. Serial No. 237,631.

T at whom it may concern.-

Be it known that I, CHARLES D. SoHRoEDER, a citizen of the United States, residing at Kansas City, in the county of Wyandotte and State of Kansas, have invented certain new and useful Improvements in Core-Making Machines, of which the following is a specification.

My invention relates to improvements in core-making machines; and my object is to provide a machine of this character for rapidly producing accurate cores of any desired length or diameter.

The invention consists in the novel construction, combination, and arrangement of parts hereinafter described, and more particularly pointed out in the claims.

In order that it may be fully understood, reference will now be made to the accompanying drawings, in which- Figure 1 represents a vertical longitudinal section of a machine embodying my invention. Fig. 2 is a plan view of a truck employed to support the forward end of the core and its lining as they are forced from the die of the machine. Fig. 3 is a broken front elevation of a truck and a clamp employed in supporting the rear end of a vent-tube used in reinforcing the core. Fig. 4 is an end view of a hollow spiral conveyer employed in carrying out the invention, and Fig. 5 is a broken side elevation of said conveyer attached to a hollow-shaft whereby it is carried and revolved.

In said drawings, 1 designates a casing provided with a feed-opening 2, communicating witha hopper 3. Said casingis mounted upon standards 4 and provided at its opposite ends with axially-alined extensions 5 and 6, respectively, the former of which is threaded at its outer end 7 and provided near its inner end with an internal shoulder 8 against which the inner end of a core-die 9 abuts. Said coredie is removably secured in extension 5 by a nut 10 engaging threads 7 in order that it may be removed when it is desired to substitute a die of smaller or greater diameter.

11 designates a hollow shaft journaled in extension 6 and having its inner end projecting into casing 1 for the reception of a disk 12, formed integral or otherwise suitably secured to a hollow spiral conveyer 13, the forward end of which extends a suitable distance into die 9, the diameter of said conveyer almost equaling the bore of the die, there being just suflicient clearance to permit the free rotation of said conveyer. Disk 12 is removably secured to the inner end of sleeves 11 by means of a set-screw 14, so that when die 9 is removed for another of different diameter a conveyer fitting the latter may be secured to said sleeve. Sleeve 11 is provided at its outer end with cog-teeth 15, intermeshing with a large intermediate cog-wheel 16', driven by a pinion 17, mounted upon a stub-shaft 18 and provided with a crank 19, whereby it is revolved. If desired, a pulley may be substituted for crank 19 when it is desired to operate the gearing and the conveyer with other than hand-power.

2O designates a perforated tube the forward end of which is passed through shaft 11 and permitted to rest in the thread of conveyer 13, while its rear end is clasped and supported by a pair of oppositely-disposed clamping members 21, consisting of V-shaped portions 22, swiveled upon the inner ends of adjustingscrews 23, engaging the internally-threaded portions 24 of an annulus 25, provided with two openings 26, in order that the square ends of adjusting-screws 23 may be engaged and turned by a wrench when it is desired to secure or release the clamping members from the rear end of tube Annulus 25 is rotatably mounted in the semicircularbody portion 27 of a truck consisting of said body portion 27 and a pair of flanged wheels 28,mounted upon stub-shafts 29, formed integral'with the terminals of said semicircular portion 27. Annulus 25 is retained upon body portion 27 by a pair of upwardly-extending flanges 30, formed integral with the latter and loosely embracing the sides of the annulus in order that the latter may move vertically a short distance independently of the truck for a purpose hereinafter described. Wheels 28 are mounted upon a pair of rails 31, extending forwardly to within a short distance of the outer end of shaft 11 in order that the truck may travel with and support the rear end of tube 20 until said truck almost contacts with said hollow shaft.

32 designates a pair of rails the rear ends of which are located at opposite sides of the forward end of die 9 for the support of a truck comprising a transverse bar 33, stubshafts 34, secured to the rearwardly-turned ends of said bar, and flanged wheels 35, mounted upon said stub-shafts and arranged to travel upon rails 32.

36 designates a plug detachably secured to the rear central portion of bar 33 by means of a screw 37 extending through said plug and said bar and is engaged at its forward end by a thumb-nut 38. Plug 36 is made detachable in order that others of difierent diameters may be substituted to fit vent-tubes of different diameters.

In practice the forward end of tube 20 is passed through hollow shaft 11 and inserted a suitable distance in conveyer 13. Its rear end is then clasped by clamping members 21. Sand is next dumped into the casing through hopper 3, and the conveyer is rotated so that it will force the sand through die 9 in the form of a core 9. It also packs the sand tightly around tube 20, so that said tube will rotate and move forwardly with the core. When the forward end of the core and the tube appear at the forward end of die 9, plug 36 is inserted in the end of said tube in order to support the latter as it moves forwardly from the die. By thus supporting the ends of tube 20 conveyer 13 will be relieved of its weight, and said ends will be prevented from swaying either downwardly or laterally, and thus cracking the core. By thus lining the core with a tube and supporting the opposite ends of the latter in the manner described it is obvious that a core of any desired length or diameter can be rapidly and accurately produced without danger of breaking. As

the same tube will be employed as a lining for a large number of cores, it may become bent more or less from the effects of the heat to which it is subjected while said cores arebeing baked. Consequently as said tube moves forwardly through conveyer 13 it may have a tendency to raise annulus 25 more or less,

and for this reason the latter is loosely mounted in semicircular portion 27, as above described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a core-making machine, a journaled hollow shaft, a hollow spiral conveyer secured to one end thereof, and suitablymounted trucks for supporting the ends of the coretube.

2. In a core-making machine, a casing having inlet and outlet openings, a die communieating with the outlet-opening, a hollow spiral conveyer arranged in the casing, a hollow shaft to which one end of the conveyer is secured, means for revolving said shaft, a plug for engaging the forward end of the oore-tube, and a longitudinally-movable truck for carrying said plug.

3. In a core-making machine, a casing having inlet and outlet openings, a die communicating with the outlet-opening, a hollow spiral conveyer arranged in the casing, a hollow shaft to which one end of the conveyer is secured, means for revolving said shaft, clamping members for supporting the rear end of the core-tube, and a longitudinally-movable truck for carrying said clamping members.

In testimony whereof I affiX my signature in the presence of two witnesses.

CHARLES 1). SCHROEDER.

Witnesses:

F. G. FISCHER, LEsLIE E. BAIRD. 

